矿区位于内蒙地轴东段中部,广泛分布的地层为前震旦纪建平群小塔子沟组(Arjnx)。岩石遭受区域勤力热流变质作用,形成以里云母斜长片麻岩、角闪斜长片麻岩、斜长角闪岩夹磁铁石英岩为主体的变质岩及各类混合岩。超基性岩体呈群带分布,分段集中,大致可划分为北、中、南三带。每带均包括 The mine is located in the central part of the eastern axis of Inner Mongolia. The widely distributed strata are the Arjnx Formation of the Pre-Sinian Jianping Group. The rocks suffered regional dyadic thermal-metamorphism and formed metamorphic rocks and various mixed rocks mainly composed of mica plagiogneiss, amphibole gneiss and amphibolite intercalated with magnetite quartzite. The ultramafic rocks are distributed in groups and concentrated in sections, which can be roughly divided into three zones: North, Central and South China. Each band includes